请问jdk的demo中的MemoryMonitor 生成的点间距怎么加宽呢?
由于我的输入基本都是10以内的整数所以生成的曲线看起来很难看 好像心电图 :(
代码如下import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.util.Date;
import javax.swing.*;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import java.applet.*;
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
*/public class MemoryMonitor extends Applet {
static JCheckBox dateStampCB = new JCheckBox("Output Date Stamp");
public Surface surf;
JPanel controls;
boolean doControls;
JTextField tf; public MemoryMonitor() {
setLayout(new BorderLayout());
//setBorder(new TitledBorder(new EtchedBorder(), "Memory Monitor"));
add(surf = new Surface());
controls = new JPanel();
controls.setPreferredSize(new Dimension(135,80));
Font font = new Font("serif", Font.PLAIN, 10);
JLabel label = new JLabel("Sample Rate");
label.setFont(font);
label.setForeground(Color.black);
controls.add(label);
tf = new JTextField("1000");
tf.setPreferredSize(new Dimension(45,20));
controls.add(tf);
controls.add(label = new JLabel("ms"));
label.setFont(font);
label.setForeground(Color.black);
controls.add(dateStampCB);
dateStampCB.setFont(font);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
removeAll();
if ((doControls = !doControls)) {
surf.stop();
add(controls);
} else {
try {
surf.sleepAmount = Long.parseLong(tf.getText().trim());
} catch (Exception ex) {}
surf.start();
add(surf);
}
validate();
repaint();
}
});
}
public class Surface extends JPanel implements Runnable { public Thread thread;
public long sleepAmount = 1000;
private int w, h;
private BufferedImage bimg;
private Graphics2D big;
private Font font = new Font("Times New Roman", Font.PLAIN, 11);
private Runtime r = Runtime.getRuntime();
private int columnInc;
private int pts[];
private int ptNum;
private int ascent, descent;
private float freeMemory, totalMemory;
private Rectangle graphOutlineRect = new Rectangle();
private Rectangle2D mfRect = new Rectangle2D.Float();
private Rectangle2D muRect = new Rectangle2D.Float();
private Line2D graphLine = new Line2D.Float();
private Color graphColor = new Color(46, 139, 87);
private Color mfColor = new Color(0, 100, 0);
private String usedStr;
public Surface() {
setBackground(Color.black);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (thread == null) start(); else stop();
}
});
} public Dimension getMinimumSize() {
return getPreferredSize();
} public Dimension getMaximumSize() {
return getPreferredSize();
} public Dimension getPreferredSize() {
return new Dimension(135,80);
}
public void paint(Graphics g) { if (big == null) {
return;
} big.setBackground(getBackground());
big.clearRect(0,0,w,h); float freeMemory = (float) r.freeMemory();
float totalMemory = (float) r.totalMemory(); // .. Draw allocated and used strings ..
big.setColor(Color.green);
big.drawString(String.valueOf((int) totalMemory/1024) + "K allocated", 4.0f, (float) ascent+0.5f);
usedStr = String.valueOf(((int) (totalMemory - freeMemory))/1024)
+ "K used";
big.drawString(usedStr, 4, h-descent); // Calculate remaining size
float ssH = ascent + descent;
float remainingHeight = (float) (h - (ssH*2) - 0.5f);
float blockHeight = remainingHeight/10;
float blockWidth = 20.0f;
float remainingWidth = (float) (w - blockWidth - 10); // .. Memory Free ..
big.setColor(mfColor);
int MemUsage = (int) ((freeMemory / totalMemory) * 10);
int i = 0;
for ( ; i < MemUsage ; i++) {
mfRect.setRect(5,(float) ssH+i*blockHeight,
blockWidth,(float) blockHeight-1);
big.fill(mfRect);
} // .. Memory Used ..
big.setColor(Color.green);
for ( ; i < 10; i++) {
muRect.setRect(5,(float) ssH+i*blockHeight,
blockWidth,(float) blockHeight-1);
big.fill(muRect);
} // .. Draw History Graph ..
big.setColor(graphColor);
int graphX = 30;
int graphY = (int) ssH;
int graphW = w - graphX - 5;
int graphH = (int) remainingHeight;
graphOutlineRect.setRect(graphX, graphY, graphW, graphH);
big.draw(graphOutlineRect); int graphRow = graphH/10; // .. Draw row ..
for (int j = graphY; j <= graphH+graphY; j += graphRow) {
graphLine.setLine(graphX,j,graphX+graphW,j);
big.draw(graphLine);
} // .. Draw animated column movement ..
int graphColumn = graphW/15; if (columnInc == 0) {
columnInc = graphColumn;
} for (int j = graphX+columnInc; j < graphW+graphX; j+=graphColumn) {
graphLine.setLine(j,graphY,j,graphY+graphH);
big.draw(graphLine);
} --columnInc; if (pts == null) {
pts = new int[graphW];
ptNum = 0;
} else if (pts.length != graphW) {
int tmp[] = null;
if (ptNum < graphW) {
tmp = new int[ptNum];
System.arraycopy(pts, 0, tmp, 0, tmp.length);
} else {
tmp = new int[graphW];
System.arraycopy(pts, pts.length-tmp.length, tmp, 0, tmp.length);
ptNum = tmp.length - 2;
}
pts = new int[graphW];
System.arraycopy(tmp, 0, pts, 0, tmp.length);
} else {
big.setColor(Color.yellow);
pts[ptNum] = (int)(graphY+graphH*(freeMemory/totalMemory));
for (int j=graphX+graphW-ptNum, k=0;k < ptNum; k++, j++) {
if (k != 0) {
if (pts[k] != pts[k-1]) {
big.drawLine(j-1, pts[k-1], j, pts[k]);
} else {
big.fillRect(j, pts[k], 1, 1);
}
}
}
if (ptNum+2 == pts.length) {
// throw out oldest point
for (int j = 1;j < ptNum; j++) {
pts[j-1] = pts[j];
}
--ptNum;
} else {
ptNum++;
}
}
g.drawImage(bimg, 0, 0, this);
}
public void start() {
thread = new Thread(this);
thread.setPriority(Thread.MIN_PRIORITY);
thread.setName("MemoryMonitor");
thread.start();
}
public synchronized void stop() {
thread = null;
notify();
}
public void run() { Thread me = Thread.currentThread(); while (thread == me && !isShowing() || getSize().width == 0) {
try {
thread.sleep(500);
} catch (InterruptedException e) { return; }
} while (thread == me && isShowing()) {
Dimension d = getSize();
if (d.width != w || d.height != h) {
w = d.width;
h = d.height;
bimg = (BufferedImage) createImage(w, h);
big = bimg.createGraphics();
big.setFont(font);
FontMetrics fm = big.getFontMetrics(font);
ascent = (int) fm.getAscent();
descent = (int) fm.getDescent();
}
repaint();
try {
thread.sleep(sleepAmount);
} catch (InterruptedException e) { break; }
if (MemoryMonitor.dateStampCB.isSelected()) {
System.out.println(new Date().toString() + " " + usedStr);
}
}
thread = null;
}
}
}
谢谢
由于我的输入基本都是10以内的整数所以生成的曲线看起来很难看 好像心电图 :(
代码如下import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.util.Date;
import javax.swing.*;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import java.applet.*;
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
*/public class MemoryMonitor extends Applet {
static JCheckBox dateStampCB = new JCheckBox("Output Date Stamp");
public Surface surf;
JPanel controls;
boolean doControls;
JTextField tf; public MemoryMonitor() {
setLayout(new BorderLayout());
//setBorder(new TitledBorder(new EtchedBorder(), "Memory Monitor"));
add(surf = new Surface());
controls = new JPanel();
controls.setPreferredSize(new Dimension(135,80));
Font font = new Font("serif", Font.PLAIN, 10);
JLabel label = new JLabel("Sample Rate");
label.setFont(font);
label.setForeground(Color.black);
controls.add(label);
tf = new JTextField("1000");
tf.setPreferredSize(new Dimension(45,20));
controls.add(tf);
controls.add(label = new JLabel("ms"));
label.setFont(font);
label.setForeground(Color.black);
controls.add(dateStampCB);
dateStampCB.setFont(font);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
removeAll();
if ((doControls = !doControls)) {
surf.stop();
add(controls);
} else {
try {
surf.sleepAmount = Long.parseLong(tf.getText().trim());
} catch (Exception ex) {}
surf.start();
add(surf);
}
validate();
repaint();
}
});
}
public class Surface extends JPanel implements Runnable { public Thread thread;
public long sleepAmount = 1000;
private int w, h;
private BufferedImage bimg;
private Graphics2D big;
private Font font = new Font("Times New Roman", Font.PLAIN, 11);
private Runtime r = Runtime.getRuntime();
private int columnInc;
private int pts[];
private int ptNum;
private int ascent, descent;
private float freeMemory, totalMemory;
private Rectangle graphOutlineRect = new Rectangle();
private Rectangle2D mfRect = new Rectangle2D.Float();
private Rectangle2D muRect = new Rectangle2D.Float();
private Line2D graphLine = new Line2D.Float();
private Color graphColor = new Color(46, 139, 87);
private Color mfColor = new Color(0, 100, 0);
private String usedStr;
public Surface() {
setBackground(Color.black);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (thread == null) start(); else stop();
}
});
} public Dimension getMinimumSize() {
return getPreferredSize();
} public Dimension getMaximumSize() {
return getPreferredSize();
} public Dimension getPreferredSize() {
return new Dimension(135,80);
}
public void paint(Graphics g) { if (big == null) {
return;
} big.setBackground(getBackground());
big.clearRect(0,0,w,h); float freeMemory = (float) r.freeMemory();
float totalMemory = (float) r.totalMemory(); // .. Draw allocated and used strings ..
big.setColor(Color.green);
big.drawString(String.valueOf((int) totalMemory/1024) + "K allocated", 4.0f, (float) ascent+0.5f);
usedStr = String.valueOf(((int) (totalMemory - freeMemory))/1024)
+ "K used";
big.drawString(usedStr, 4, h-descent); // Calculate remaining size
float ssH = ascent + descent;
float remainingHeight = (float) (h - (ssH*2) - 0.5f);
float blockHeight = remainingHeight/10;
float blockWidth = 20.0f;
float remainingWidth = (float) (w - blockWidth - 10); // .. Memory Free ..
big.setColor(mfColor);
int MemUsage = (int) ((freeMemory / totalMemory) * 10);
int i = 0;
for ( ; i < MemUsage ; i++) {
mfRect.setRect(5,(float) ssH+i*blockHeight,
blockWidth,(float) blockHeight-1);
big.fill(mfRect);
} // .. Memory Used ..
big.setColor(Color.green);
for ( ; i < 10; i++) {
muRect.setRect(5,(float) ssH+i*blockHeight,
blockWidth,(float) blockHeight-1);
big.fill(muRect);
} // .. Draw History Graph ..
big.setColor(graphColor);
int graphX = 30;
int graphY = (int) ssH;
int graphW = w - graphX - 5;
int graphH = (int) remainingHeight;
graphOutlineRect.setRect(graphX, graphY, graphW, graphH);
big.draw(graphOutlineRect); int graphRow = graphH/10; // .. Draw row ..
for (int j = graphY; j <= graphH+graphY; j += graphRow) {
graphLine.setLine(graphX,j,graphX+graphW,j);
big.draw(graphLine);
} // .. Draw animated column movement ..
int graphColumn = graphW/15; if (columnInc == 0) {
columnInc = graphColumn;
} for (int j = graphX+columnInc; j < graphW+graphX; j+=graphColumn) {
graphLine.setLine(j,graphY,j,graphY+graphH);
big.draw(graphLine);
} --columnInc; if (pts == null) {
pts = new int[graphW];
ptNum = 0;
} else if (pts.length != graphW) {
int tmp[] = null;
if (ptNum < graphW) {
tmp = new int[ptNum];
System.arraycopy(pts, 0, tmp, 0, tmp.length);
} else {
tmp = new int[graphW];
System.arraycopy(pts, pts.length-tmp.length, tmp, 0, tmp.length);
ptNum = tmp.length - 2;
}
pts = new int[graphW];
System.arraycopy(tmp, 0, pts, 0, tmp.length);
} else {
big.setColor(Color.yellow);
pts[ptNum] = (int)(graphY+graphH*(freeMemory/totalMemory));
for (int j=graphX+graphW-ptNum, k=0;k < ptNum; k++, j++) {
if (k != 0) {
if (pts[k] != pts[k-1]) {
big.drawLine(j-1, pts[k-1], j, pts[k]);
} else {
big.fillRect(j, pts[k], 1, 1);
}
}
}
if (ptNum+2 == pts.length) {
// throw out oldest point
for (int j = 1;j < ptNum; j++) {
pts[j-1] = pts[j];
}
--ptNum;
} else {
ptNum++;
}
}
g.drawImage(bimg, 0, 0, this);
}
public void start() {
thread = new Thread(this);
thread.setPriority(Thread.MIN_PRIORITY);
thread.setName("MemoryMonitor");
thread.start();
}
public synchronized void stop() {
thread = null;
notify();
}
public void run() { Thread me = Thread.currentThread(); while (thread == me && !isShowing() || getSize().width == 0) {
try {
thread.sleep(500);
} catch (InterruptedException e) { return; }
} while (thread == me && isShowing()) {
Dimension d = getSize();
if (d.width != w || d.height != h) {
w = d.width;
h = d.height;
bimg = (BufferedImage) createImage(w, h);
big = bimg.createGraphics();
big.setFont(font);
FontMetrics fm = big.getFontMetrics(font);
ascent = (int) fm.getAscent();
descent = (int) fm.getDescent();
}
repaint();
try {
thread.sleep(sleepAmount);
} catch (InterruptedException e) { break; }
if (MemoryMonitor.dateStampCB.isSelected()) {
System.out.println(new Date().toString() + " " + usedStr);
}
}
thread = null;
}
}
}
谢谢
解决方案 »
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